71916 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71916 ACD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-lubricated and matched set of two, it is engineered to accommodate combined loads (radial and axial) simultaneously. Its P4A tolerance class and extra light preload (Class A) ensure smooth, high-precision operation, making it ideal for high-speed spindles and other precision machinery where minimal runout and high system rigidity are critical.
71916 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71916 | Basic bearing series and size designation (80mm bore, 110mm OD, 32mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | Two bearings in a universal matchable (SU) set |
| P4A | High precision tolerance class (exceeding ABEC 7) |
| DGA | Universal match pairing designation (can be paired in any combination) |
Structural Features and Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 25° contact angle provides optimal support for combined radial and axial loads. The universal matching (SU) configuration of two bearings increases system stiffness and moment load capacity.
Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD tolerance: -0.004mm to 0), ensuring minimal vibration and precise rotational accuracy.
High-Speed Capability: The phenolic cage and optimized internal geometry enable stable operation at limiting speeds up to 17,000 rpm, making it suitable for high-speed applications.
Superior Material Construction: Manufactured from chrome steel for both rings and balls, providing excellent wear resistance and durability under demanding operating conditions.
71916 ACD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles - High-speed milling and grinding spindles requiring precision and rigidity
- Precision Instrumentation - Measuring equipment and optical devices demanding minimal runout
- High-Speed Motors - Servo motors and spindle drives operating at elevated speeds
- Medical Equipment - Dental handpieces and surgical tools requiring smooth, precise rotation
- Aerospace Components - Guidance systems and auxiliary power units
